difficult-to-break
difficult-to-cut
difficult-to-drill
difficult-to-extrude
difficult-to-form
difficult-to-machine
difficult-to-make
difficult-to-mill
difficult-to-pump
difficult-to-quantify
  diffraction
diffractometer
diffuse
diffused
diffuser
diffusion
diffusion-ejector
diffusionless
diffusivity
diffusor
dig

    diffraction grating

    дифракционная решётка